I need some suggestions for my FI project

[81xsproject]

I am getting VERY close to installing the EFI conversion. The MegaSquirt is assembled and I am ready to start the installation. However, I still have 2 major hurdles to overcome, one of which is the fuel pump. First off, I know that the 99-00 busa's had an external fuel pump. They are like gold and impossible to get a hold of. I also already know about MSD's small ex pump, but I have heard that it's too much pump, spends too much time loaded up, and will burn up after a short time as a result.

So, with that said, I have a gsxr in tank pump that I want to use. After some experimentation, I have concluded that it can't be used externally. In need to come up with a SMALL enclose for it. It barely needs to be larger than the pump itself (2x5" cylinder). Unfortunately, PVC doesn't hold up to gas. It would also be nice if this tank didn't weigh 5 lbs by itself (like steel pipe with cast caps).

The has got to be some perfect little container that I could use and do cheap. Any ideas?

[mro]

Aluminum tubing?

mro
BTW
Why not install it in your regular tank?
Plasma cutter to cut instalation hole then then make a "hatch" to cover hole for future access.

[psycoreefer]

I've been thinking of making up a custom one off fiber glass tank that would go in the space down where the swing arm mounts. If you've got an after market exhaust and no center stand like me then there is quite a bit of space down there. I figure it would hold about a gallon or maybe a bit more and would be perfect for holding a fuel pump. I've been thinking of the Mega squirt as well for future mod. and look forward to your report on how it all works.

What I was thinking was fill the gap with a bit of expanding foam, trim till it fits/removes easily. Then use that as a base to build the glass tank. once its glassed and set up pour in a bit of acetone and then let it disolve all the foam. Shouldn't be to hard.

As a bonus you'll get a good bit of extra range and the weight way down low like that should help the center of gravity.

[strom]

I am in process of getting a new one for my guzzi. Its a bosch one, external,...
I think most italian (crap) cars use the same thing. Just me mindful of the pressure release valves and outlets and thingies...

Why, oh why did they have to make FI guzzi...
Im looking at carb conversions
2x dellorto 40
1x electronic ignition system to replace the crap guzzi one (the ECU is the size of my notebook?!)
54524652654x ride

On the XS note... i have to re-register my 79... expired a month ago and I went for a short blast up and down the street to "wake up" cyl #3.
Yeah, just an excuse

I have no idea what to do with the 78.
There really is no excuse to get properly sorted. Everything must be replaced/fixed except for the top end (motor).
Frame is a bit bent methinks, wheels are... welded, wires are falling apart, seat needs new cover, tank needs replacing, bottom part of the engine needs replacing, the whole thing would need a new coat of paint, front suspension needs replacing, tires are bald, battery is dead, turn signal relay is giving away smoke signals, brake lines need rerouting, pads needs changing, middle drive sounds weird....
But tbh, it only needs new mufflers to ride it as it is. And I dont ride it since I have 79xs and the guzzi.
I wont cannibalize it for parts and I wont sell it since its not worth anything really. Flower pot maybe?

[Mathh]

I also have an automotive Bosch fuel pipe on my bike with an automotive fuel filter in line. Saves you the hassle of building a housing for your onboard pump.

[TADracer]

I was thinking kind of like MRO. Probably best to mount it in your present tank since the fuel probably contributes to the cooling and lubrication of the in-tank pump. But then, I am just thinking.

You are going to post a bunch of pictures, aren't you?

[Ivan]

how much pressure does megasquirt use? is it a low pressure TBI type system?

[psycoreefer]

Ivan,
It depends on what injectors you use with it. Megasquirt is the name of a DIY ECM that you can program to run nearly anything. Can even do both fuel and ignition, with each system coming from different "donors".

I'm guessing he's using the FI off of a newer sport bike and will probably need somewhere around 50psi for the injectors to work like they should.

[Dsxs11]

Being a MS dork (Having one of the first cars running V1) Autozone sells and inline pump for about 40 bucks . It's maybe 3.5-4 inches long 2.5 round should fit under the top tube under the tank. It's not online and I assume all the Mcparts stores carry a version of it.

[81xsproject]

Part of the issue with pumps is that it has to be 38-42 psi. The great thing about this pump is that it was made to work with the throttle bodies I am using.

[Shappers]

When I needed a 'busa pump for my FI, I had to wait 3 months for one to come along on ebay. They do come along infrequently as the drag racers always ditch the standard pumps.

I would say hang out for one and expand your search to Europe as well. People have no problem shipping anything to the US. The 'busa pump is compact and has the fuel filters and the regulator all built into it. If you go for an unregulated pump then you will need to tap into the fuel rail to get a regulator on the end of it. Far simpler to use the 'dead end' supply system.

In my opinion there is nowhere on the bike to put an additional tank, there is not enough room below the battery tray before you hit the swingarm. I twisted and turned my pump in every direction to find a place for it to go, it ended up just behind the battery where the toolbox used to be.





Just remembered another big deal. Most automotive pumps will just take too much electrical power from the bike. The pumps built for bikes are very economical with the juice. You can offset the load by simply ditching the tail lights for LED bulbs!

[81xsproject]

That is why that bosch pump seems no good that thing draws 10 amps and pumps way too much fuel. The only prob with buying from Europe is the exchange rate. I pretty much can't afford anything from across the pond these days. Luckily the intank pump is much smaller than the busa bump so room is available.

[Geezer]

Ave you considered one of those spun aluminum fuel bottles used by backpackers to carry fuel for camp stoves?

One of these should be just the right size for the internal pump. Otherwise you could remove the gas gauge sensor and put the pump there.

Geezer

[81xsproject]

I tried getting it in the sensor/gauge hole of my standard tank with no luck.

[Shappers]

This is quite much room above the battery before the bottom of the seat, you can see from my first picture how much higher my pump is than the battery.

How about making a fuel tank the same size as the battery and placing it there. You would have a nice, secure, rubber isolated 2nd fuel tank with your 'busa pump inside. Above you could fit a quite decent sized flat gell battery between the frame rails. I'm sure you could fit a 2" high battery in there.

It's got to be easier relocating the battery than a seperate fuel tank.

Where are you mounting the Megasquirt box? Do you have the original large box?